"""T+ 基础导入与试算的隔离工作区，任何表均不关联正式工资台账。"""

from datetime import datetime

from sqlalchemy import JSON, DateTime, Index, Integer, String, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column

from app.models.base import BIGINT_UNSIGNED, Base, TimestampMixin, mysql_table_args


class TPlusSourceHead(Base):
    """一次完整读取实际观察到的源版本；解决 A→B→A 去重后的旧版本误选。"""

    __tablename__ = "tplus_source_heads"
    __table_args__ = mysql_table_args(
        "T+ 源当前快照指针（按成功全量批次读取，删除不自动回写业务表）",
        UniqueConstraint(
            "source_database",
            "entity_type",
            "source_id",
            name="uk_tplus_source_heads_source_entity_id",
        ),
        Index("idx_tplus_source_heads_batch_entity", "batch_no", "entity_type"),
    )
    id: Mapped[int] = mapped_column(
        BIGINT_UNSIGNED, primary_key=True, autoincrement=True, comment="主键ID"
    )
    source_database: Mapped[str] = mapped_column(String(128), comment="源账套")
    entity_type: Mapped[str] = mapped_column(String(32), comment="实体类型")
    source_id: Mapped[str] = mapped_column(String(64), comment="源内部ID")
    record_id: Mapped[int] = mapped_column(BIGINT_UNSIGNED, comment="原始快照ID")
    batch_no: Mapped[str] = mapped_column(String(32), comment="最后观察批次")


class TPlusFact(Base, TimestampMixin):
    """补充资料追加版本，旧版本永久保留，乐观锁防止静默覆盖。"""

    __tablename__ = "tplus_facts"
    __table_args__ = mysql_table_args(
        "T+ 人工补充事实版本表",
        UniqueConstraint(
            "source_database",
            "kind",
            "fact_key",
            "version",
            name="uk_tplus_facts_source_kind_key_version",
        ),
    )
    id: Mapped[int] = mapped_column(
        BIGINT_UNSIGNED, primary_key=True, autoincrement=True, comment="主键ID"
    )
    source_database: Mapped[str] = mapped_column(String(128), comment="源账套")
    kind: Mapped[str] = mapped_column(String(32), comment="事实类别")
    fact_key: Mapped[str] = mapped_column(String(128), comment="事实业务键")
    version: Mapped[int] = mapped_column(Integer, comment="版本号")
    data_json: Mapped[dict] = mapped_column(JSON, comment="经校验的事实内容")
    evidence: Mapped[str] = mapped_column(String(500), comment="依据和修改原因")
    requested_by: Mapped[int] = mapped_column(BIGINT_UNSIGNED, comment="操作者ID")


class TPlusSourceLink(Base, TimestampMixin):
    """源稳定身份与业务目标的唯一关联；不按名称猜测合并。"""

    __tablename__ = "tplus_source_links"
    __table_args__ = mysql_table_args(
        "T+ 基础数据源目标关联",
        UniqueConstraint(
            "source_database",
            "entity_type",
            "source_id",
            name="uk_tplus_source_links_source_entity_id",
        ),
        UniqueConstraint("entity_type", "target_id", name="uk_tplus_source_links_entity_target"),
    )
    id: Mapped[int] = mapped_column(
        BIGINT_UNSIGNED, primary_key=True, autoincrement=True, comment="主键ID"
    )
    source_database: Mapped[str] = mapped_column(String(128), comment="源账套")
    entity_type: Mapped[str] = mapped_column(String(32), comment="实体类型")
    source_id: Mapped[str] = mapped_column(String(64), comment="源内部ID")
    target_id: Mapped[int] = mapped_column(BIGINT_UNSIGNED, comment="业务目标ID")


class TPlusWorkRun(Base, TimestampMixin):
    """后台导入、预览和试算运行记录，固定输入，保留终态。"""

    __tablename__ = "tplus_work_runs"
    __table_args__ = mysql_table_args(
        "T+ 导入与预演运行表",
        UniqueConstraint("run_no", name="uk_tplus_work_runs_run_no"),
        UniqueConstraint("request_key", name="uk_tplus_work_runs_request_key"),
        Index("idx_tplus_work_runs_status_id", "status", "id"),
    )
    id: Mapped[int] = mapped_column(
        BIGINT_UNSIGNED, primary_key=True, autoincrement=True, comment="主键ID"
    )
    run_no: Mapped[str] = mapped_column(String(32), comment="运行编号")
    request_key: Mapped[str] = mapped_column(String(36), comment="请求幂等键")
    kind: Mapped[str] = mapped_column(
        String(32), comment="MASTER_PREVIEW/MASTER_APPLY/CALC_PREVIEW"
    )
    status: Mapped[str] = mapped_column(String(16), default="QUEUED", comment="运行状态")
    source_database: Mapped[str] = mapped_column(String(128), comment="固定源账套")
    requested_by: Mapped[int] = mapped_column(BIGINT_UNSIGNED, comment="操作者ID")
    input_json: Mapped[dict] = mapped_column(JSON, comment="请求输入")
    snapshot_json: Mapped[dict | None] = mapped_column(JSON, comment="规则和补充资料的固定快照")
    snapshot_hash: Mapped[str | None] = mapped_column(String(64), comment="输入指纹")
    summary_json: Mapped[dict | None] = mapped_column(JSON, comment="结果汇总")
    error_code: Mapped[str | None] = mapped_column(String(64), comment="固定错误编码")
    started_at: Mapped[datetime | None] = mapped_column(DateTime, comment="开始时间")
    finished_at: Mapped[datetime | None] = mapped_column(DateTime, comment="结束时间")


class TPlusWorkLine(Base):
    """固定输入及结果逐行留存，仅经授权的工作区接口可访问。"""

    __tablename__ = "tplus_work_lines"
    __table_args__ = mysql_table_args(
        "T+ 导入预览与核算预演明细",
        UniqueConstraint("run_no", "line_no", name="uk_tplus_work_lines_run_line"),
    )
    id: Mapped[int] = mapped_column(
        BIGINT_UNSIGNED, primary_key=True, autoincrement=True, comment="主键ID"
    )
    run_no: Mapped[str] = mapped_column(String(32), comment="运行编号")
    line_no: Mapped[int] = mapped_column(Integer, comment="稳定行序号")
    entity_type: Mapped[str] = mapped_column(String(32), comment="实体或分组类型")
    source_id: Mapped[str] = mapped_column(String(128), comment="源ID或平账组")
    action: Mapped[str] = mapped_column(String(32), comment="新增/更新/跳过/待补/冲突/分配")
    reason: Mapped[str | None] = mapped_column(String(128), comment="固定原因编码")
    data_json: Mapped[dict] = mapped_column(JSON, comment="最小必要的业务明细")


WORKBENCH_MODELS = (TPlusSourceHead, TPlusFact, TPlusSourceLink, TPlusWorkRun, TPlusWorkLine)